C1 - Communication failure (main-sub PCB)

What does C1 mean?

• Failure of communication between PCBs.
• Fan motor control driver defect.

Click steps to track your progress.

1. 1

   Power cycle the unit by turning off the breaker for 60 seconds.

2. 2

   Check for any loose connections between the main and sub PCBs.

3. 3

   If the communication error persists, a technician may need to diagnose the PCBs.